2. In a certain experiment it was found that the pressure inside the vessel varies with time according to the equation given below. The following data has been collected by some experiments (round to the correct significant figures) (20 Marks) 3 t (min) P (atm) 6 3.71 9 4.29 12 4.82 3.06 = a(t +5)-6 a) Find the units of the constant a and b b) How would you plot the data to get a straight line on rectangular coordinates? What will be the slope and the intercept? c) Plot the data to get the straight line and find the values of the constant a and b. d) Using the equation determine the pressure at 15 min e) Use two-point linear interpolation to pressure at 7 min f) Comment on the results obtained in part (d) and part (e) 1